/*
 * Copyright (C) 2022 Parisi Alessandro
 * This file is part of MaterialFX (https://github.com/palexdev/MaterialFX).
 *
 * MaterialFX is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * MaterialFX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with MaterialFX.  If not, see <http://www.gnu.org/licenses/>.
 */

package io.github.palexdev.materialfx.utils;

import io.github.palexdev.materialfx.controls.base.AbstractMFXTreeItem;

import java.util.Iterator;
import java.util.Stack;

public class TreeItemIterator<T> implements Iterator<AbstractMFXTreeItem<T>> {
	private final Stack<AbstractMFXTreeItem<T>> stack = new Stack<>();

	public TreeItemIterator(AbstractMFXTreeItem<T> item) {
		stack.push(item);
	}

	@Override
	public boolean hasNext() {
		return !stack.isEmpty();
	}

	@Override
	public AbstractMFXTreeItem<T> next() {
		AbstractMFXTreeItem<T> nextItem = stack.pop();
		nextItem.getItems().forEach(stack::push);

		return nextItem;
	}
}